For the recipe of pork fillets with honey and browned plums, tie the pork fillets with a string of kitchen string around the edge, so as to obtain 6 round medallions, which keep their shape even during cooking. Mix the soy sauce with honey in a bowl and dip the fillets; cover them and marinate them in the refrigerator for 30 minutes. Drain the fillets from the marinade (keep it) and brown them in a pan with 2 nuts of bubbling butter, for about 2 minutes per side, then cover with a lid, lower the heat and cook for another 12-15 minutes per side, then cover with a cover, lower the heat and cook for another 3-4 minutes. Cut the plums into wedges and brown them in another pan, with a small knob of butter for 1-2 minutes and turn off. Serve the fillets with prunes and the sauce.